Insulator.



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BY JMMU'LT/Pn WITNESSES ATTORNEY FRANCK S. GREGUR, 0F WEST BROWNSVILLE, PENNSYLVANIA. j

INSULATOR.

Specication of Letters Patent.

Patented Sept. 25, 191 '7.

Appiication filed February 7, 1917. serial No. 147,156.

To all 'whom t may concern:

Be it known that I, FRANCK S. GREGUR, a subject of the Emperor of Austria, residing at Vest Brownsville, in the county of Washington and State of Pennsylvania, have invented certain new and useful Improve ments in Insulators, of which the followingv is a specification.

This invention relates to insulators, and has forits primary object to provide improved means whereby a line wire may be quickly and easily attached to its support, without resorting to the necessity of binding wire or other securing elements now commonly used as a retainer. A further object of the invention is to provide an insulator which may be quickly and easily operated to release the wire when it is desired to take the latter down for repairs or other purposes.-

A further object of the invention is to provide a wire supporting means of this character which employs a clamping means for the line wire,- and wherein the wire 1s so held within the clamping means as to be impossible of becoming accidentally disengaged therefrom. A further object is to provide an insulator which may be readily applied to the cross arms or other supports now generally used for supporting insulators, and therefore does-not require supports or special construction.

A still further and particular object is to provide an insulator of this character which is of simple and inexpensive construction, which comprises but few separable parts,

which has its parts so constructed and assembled as to minimize the possibility of wear, breakage, or derangement, which is capable of being quickly operated, and which will prove thoroughly eflicient in the attainment of the ends for which it is designed.

With these objects in view, together with the others which will appear as the description proceeds, the invention resides in the novel formation,v combination, and arrangement of parts, all as will be described more Afully hereinafter, illustrated in the drawings, and particularly pointed out in the claims.

In the drawings Figure 1 -is a front elevation of an insulator constructed in accordance with the invention, and showing the same in operative position;

Fig. 2 is a side elevation of the improved insulator, and showing the clamping member raised or in inoperative position;

Fig. 3 is a vertical sectional View taken through the insulator, and illustrating the manner in which wire is clamped therein;

Fig. 4 is a sectional View taken on line 4-4 of Fig. 1; and

Figs. 5 and 6 are detail perspective views of the coacting clamping or insulator blocks em loyed in carrying out the invention.

eferring now more particularly to the drawings, 10 indicates the base or support for the insulator proper, and comprises in the present instance a tubular member threaded internally at its lower end so as to be capable of being screwed upon the supporting post or peg 11 on the cross arm of a line pole. The opposite extremity of the tubular member is also internally threaded and receives the threaded shank 12 of a base or bottom plate indicated at 13. This bottoln plate has upwardly and inwardly eX- tending flanges or guide members 14 at its side edges, to confine between them an insulator block indicated generally at 15. The insulator block 15 is provided in its side edges with grooves 16, the construction providing a dovetail arrangement to fit within the flanges 14: on the base plate. This arrangement permits of the base insulator block sliding' upon the plate 13, but the flanges 14 will prevent the blockmoving laterally or vertically away from the said base plate.

Associated with the device so far described is a clamping element for holding a line wire firmly upon the insulator block 15. This clamping device comprises a clamping plate 17, having downwardly and inwardly projecting flanges 18 to engage the side edges of an upper insulator block indicated at 19. The means of connection between the block 19 and the clamping plate 17 is identical with that between the block 15 and the base plate 13, so that the upper block may be freely slid upon the clamping plate. Depending from the rear end of the upper or clamping plate 17 is a post or arm 20, the said arm being bent forwardly at its lower end as at 21 and is engaged around a sleeve 22 mounted for movement upon the tubular member 10. This sleeve is threadedly engaged upon the exterior of the tubular member and is provided adjacent its upper edge with an outwardly extending annular flange vThis flange bears against the plate 21 projecting forwardly from the arm 20, and 1t is apparent that as the sleeve moves downwardly Athe clamping member will also be 'forced in the same direction. When the sleeve is moved upwardly, the clamp is' free connection with the above described holder may be formed of porcelain, glass, rubber, `or other suitable material, and the coacting faces of the said blocks are equipped with wire holding or clamping means. One of vthe blocks, and preferably the base block 15, is provided in its upper face with a plurality of Lspaced relatively shallow longitudinally disposed grooves or depressions 25, adapted to receive downwardly projecting lugs or bosses 26 on the under face of the upper block 19. The lugs 26 are of substantially the same length and depth as the depressions 25, but are narrower than the latter, so that a relatively snug lit of the parts i.- assured. The upper surface of the block 1L is provided with a lateral groove 27, the said groove extending throughout the width of the block. The central portlons of the downwardly extending lugs 26 are also provided with grooves 28, which are adapted when the blocks are in operative position to be disposed in the same vertical plane. The base block 15 has upstanding side fianges 29, which snugly engage the longitudinal edges of the upper block 19.

From this construction, it is apparent that when the upper block 19 is fitted upon the lower block, with a line wire 30 properly positioned within the groove 27, downward pressure upon the upperblock will force the wire 30 between the blocks into the depressions 25. The wire will assume the shape illustrated in Fig. 3 of the drawings, when theblocks are held tightly together, and it will be impossible for the wire to become detached. By providing the grooves in the lower block andin the lower faces of the lugs 26 ofthe upper block, it is apparent that the Wire will not be sharply bent or kinked, so that dahger of injury of the wire is obviated.

In operation, the tubular member 1.0 is attached to the cross arm or other support for the insulator. The sleeve 22 is screwed upwardly upon the tubular member so that the clamp plate 17 may be raised. The base block 15 is then adjusted to thesupport 13, and the line wire 30 is placed within the lateral groove extending across -the said block. The `upper block 19 may be applied to the clamping plate 17, and when the sleeve22 is screwed downwardly, block will be brought into engagement with the base block 15. The wire will bebound firmly between the insulator blocks, and will remain so until the sleeve is moved so as to the upper v release the clamping plate. If desired, the insulatorl blocks may be applied to the wire before'l being placed Within the holder, and itis obvious that the particular arrangement of dovetail blocks and flanges upon the holder will permit of the ready introduction of the insulator blocks to the holder.

The forwardly projecting portion 21 which loosely incloses the sleeve 22 is yc'apable of freely rotating around the said sleeve, so that the clamp plate 17 may be readily moved so as to project across the basexplate from different directions. This feature permits of the holder being used to .efficiently hold wire which turns corners oi' projects at angles. The vertically `disposed arm 20 which connects the member 2l and the clamping plate 17 arrests the4 rearward movement of the insulator blocks 15-19 within the holder. I

The tubular member 10 in the present instance is shown as being threadedly attached to the support or stem 11 upon the cross arm but it will be understood that the design or shape of the member 10 may be varied to suit supporting or holding devices'of different shapes, sizes or types.

While the present 'disclosure' is that of what I believe to be the preferred embodiment of the invention, it is to be understood that the invention is not limited thereto, but

that various changes may be made in the construction, arrangement, and proportion of parts, without departing from the spirit of the invention, as defined in the appended claims.

What is claimed is 1. In an insulator, a support, a clamping member capable of moving toward and away from said support, wire clamping means on said support and clamping member, a movable sleeve 0n said support, and means governed by the movements of said sleeve for moving said clamping member toward and away from said support.

2. In an insulator, a support,`a clamping member capable of moving toward and'away from said support, wire clamping means on said supportand clamping member, a sleeve threaded upon said support, anda connection between said clamping member and said sleeve.

3. In an insulator, a support, a clamping member capable of moving toward and away from said support, wire clamping means on said support and clamping member, asleeve on said support adapted to movel toward and away from said clamping means, anda. plate depending from said clamping .member and being attached to said sleeve.

4. In an insulator, a support, a base'plate capable of being rotated upon said support, a clamping plate rotatably mounted upon said support and being adapted to move tofor moving seid. clamping plate, and insucarried by said base and clamping plates, f'

the said blocks being dovecaileol in cross section to be reeeled between said anges, and

copereting binding means upon. the adjacent faces of said blocks. f

6. In on insulate?, a post, a bese plate detechably siecui'ecl to said post, o sleeve threaded upon seid post, e clamping plete, e downvverdly projecting arm on said. clamping plate surrounding said sleeve and capable of being moved by the latter, insulator bloelzsieerried by said base and clamping plases, and means upon the coacting faces of said blocks for clamping a. Wire.

ln testimony whereof I ax my signature in presence of two Witnesses.

` FRANCK S. GREGUR.

Viitnesses:

CHARLES E. Eems, Geom C. SHEM.

Gomes o: mie patent may he obtained for ave cents each, by addessing the Gommisioner of latent,

Washington, D. 6. 

